Test And Clear The Facility Loopback Or Payload Loopback Circuit; Test The Optical Card - Cisco ONS 15600 SDH Troubleshooting Manual

Chapter 1 General Troubleshooting

Test and Clear the Facility Loopback or Payload Loopback Circuit

If the test set is not already sending traffic, send test traffic on the loopback circuit.
Step 1
Examine the traffic received by the test set. Look for errors or any other signal information that the test
Step 2
set is capable of indicating.
If the test set indicates a good circuit, no further testing is necessary with the facility loopback. Clear the
Step 3
loopback:
a.
b.
c.
d.
Step 4 Complete the

Test the Optical Card

Step 1 Complete the
with a known-good one.
Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this,
Caution
perform an external switch if a switch has not already occurred. See the procedures in the
"2.8.2 Protection Switching, Lock Initiation, and Clearing" section on page
information, refer to the "Maintain the Node" chapter of the Cisco ONS 15600 SDH Procedure Guide.
Step 2 Resend test traffic on the loopback circuit with a known-good card installed.
Step 3 If the test set indicates a good circuit, the problem was probably the defective card. Return the defective
card to Cisco through the returned materials authorization (RMA) process. Contact Cisco Technical
Support (1 800 553-2447).
Complete the
Step 4
Clear the facility loopback:
Step 5
Step 6 If the test set indicates a good circuit, no further testing is necessary with the facility or payload
loopback. Clear the loopback:
a.
b.
c.
d.
July 2010
Click the Maintenance > Loopback > Port (or Maintenance > Optical > Loopback > Port) tabs.
Choose the appropriate state (Unlocked; Locked,disabled; Locked,maintenance;
Unlocked,automaticInservice) from the Admin State column for the port being tested. If multiple
ports are available, select the appropriate row for the desired port. (The new administrative state will
override the loopback.)
Click Apply.
Click Yes in the confirmation dialog box.
"Test the Optical Card" procedure on page
"Replace an I/O Card" procedure on page 2-134
"Replace an I/O Card" procedure on page 2-134
Click the Maintenance > Loopback > Port (or Maintenance > Optical > Loopback > Port) tabs.
Choose the appropriate state (Unlocked; Locked,disabled; Locked,maintenance;
Unlocked,automaticInservice) from the Admin State column for the port being tested. If multiple
ports are available, select the appropriate row for the desired port. (The new administrative state will
override the loopback.)
Click Apply.
Click Yes in the confirmation dialog box.
1.2.1 Perform a Facility Loopback or Payload Loopback on a Source-Node Optical Port
1-9.
Cisco ONS 15600 SDH Troubleshooting Guide, R8.0
for the suspected bad card and replace it
2-123. For more
for the faulty card.
1-9